Fix adding package info to NuGet package (#3125)

Author: hazzik

build-common/NHibernate.props

@@ -32,8 +32,7 @@
     <TreatSpecificWarningsAsErrors />
 
     <DisableImplicitPackageTargetFallback>True</DisableImplicitPackageTargetFallback>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsPackable)' == 'True'">
+
     <PackageProjectUrl>https://nhibernate.info</PackageProjectUrl>
     <PackageIconUrl>https://raw.githubusercontent.com/nhibernate/nhibernate-core/master/logo/NHibernate-NuGet.png</PackageIconUrl>
     <PackageIcon>NHibernate-NuGet.png</PackageIcon>